Wringer roll stop mechanism



July 2, 1940; v DUNN 2,206,302

WRINGER ROLL STOP MECHANISM Filed Jan. 2, 1937 4 Sheets-Sheet 1 IAfNTgR.

ATTORNEYS.

July 2 1940. v. E. DUNN WRINGSR ROLL STOP IECHANISH 4 Sheets-Sheet 2Filed Jan. 2, 1937 INgNTOR. P

ATTORNEYS.

y 1940. v. E. DUNN WRINGER ROLL STD? MECHANISM 4 Sheets-Sheet 3 FiledJan. 2, 1937 1. rll IV Illa I'll; 9 A r INVENEUR ATTURNEYE.

July 2, 1940. v N 2,206,302

WBINGER ROLL STOP MECHANISM Filed-Jan. 2, 1937 4 Sheets-Sheet 4 IN'V'ENTER AITEIENEYEL.

Patented July 2, 1940 UNITED STATES PATENT OFFICE Thisinventionrelatespto wringers for domestic washing machines. and particularly tothat part ofthe wringer mechanismwhich stops rotation of the .rol1s whenpressure is ease Experience with domestic Wringers has proven.

that, when accidents occur, it is highly desirable to stop-rotation ofthe rolls because continued rotation causesjserious damage to garmentsand more serious injuries to the operator, when caught. 1 v u Theparticular object of this invention. is to provide mechanismcoactingwith the roll pres.- sure means whereby rotation of i the rollsis stopped when roll pressure is released. Another object is to providea roll stop mecha nism. almost wholly contained in the gear head of thewringer so as to make possible. the application ofthis mechanism toother kinds and types of wringers. u a a Other objects and benefits willbe disclosed in the following description and drawings in which: Fig. lis a front elevation of a wringer embody ing my roll stop mechanism withone end of the f wringer case and most of the wringer head broken awayto the longitudinal center line to better disclose the arrangement ofthe interior parts; Fig. 2 isa sectionalend elevation view on thesection lines 2--2, Fig. .1, showing the pressure handle in releasedpositioninits relation with the clutch cam and cam dog in stopped.position. Fig. 3 is a sectional end elevation View onthe sectionlines2-2, Fig. 1, the same as Fig. 2, except that the pressurehandle is nowin pressure application position and the clutch cam ha 35 been forcedinto engaged position.

Fig. 4. is a partial sectional; end elevation view on the section line 44, Fig. 1, showing the rolls and pressure mechanism in pressurerelation;

Fig. 5 is a similar sectional endelevation view, the same as Fig. 4except. that the rolls and mechanism are in released relation but readyto apply roll pressure corresponding to Fig. 3; i

Fig. 6 is a broken cross sectional side elevation of the full plate andtapered point lock bar as shown in position of Fig. 4;

Fig. 7 is an enlarged side elevation, partially in cross section,showing the arrangement of the dog latch and cam arm in locked relation;

Fig. 8 is the same view as Fig. 7 except that it shows the dog latchmoved out of latching engagement with the cam arm by upward movement ofthe wringer roll and slotted bearing bracket;

Fig. 9 is a broken, side elevation view of the wringer and head withexterior parts broken away to show theresultant action of the mechanismwhen the upper roll has been released upward, the driven gear disengagedand the roll stopped; Fig. 10 is an enlarged detailed cross sectionalview of the drive mechanism between the roll and bevel gear showing theparts in drive relation;

Fig ll is a similar view to Fig. 10 showing the drive gear disengagedand the roll stopped; and

Fig. 12 is a small broken back elevation view of the wringer headshowing the pressure handle in relation to the pressure shaft.

Now referring to Fig. 1, I designate the main frame of the wringer bythe numeral if]. It will be noted that the wringer frame and head areintegral, a sub-head gear case 15 being mounted in the head portion ofthe combined wringer frame and head I0.

The top frame ll, carrying bearing bosses 22 for the upper roll [3, hasa conventional release mechanism I 4 retracting tapered latch bars 25and is slidable vertically in the mainframe Ill. The lower frame Incarries the lower roll i2 by stationary bearings, one cast in portionIii located in outside end of wringer and one located in cast portion itof frame I 0 between'the end of the roll l2 and the drive mechanism.Bearing bracket 36 houses cams M and 42, as well as drive tube 31.Bracket 36 and sub-gear case are bolted together as shown in Fig. l withround .head

screws. This assembly is then boltedto Ill with four screws a, Fig. l.is shown. Attached to the lever 28 are end. plates 2i held Only one ofthe screws in vertical alignment by the guide block Ill" and the slottedopening 32 about the shoulder rivet 32. See Fig. 4.

These end plates are attachable to the top frame by means of the taperedend latch bars 21!), the tapers 20 on the bars bearing in the taperfaces 33 of the slot 33. See Fig. 6.

The sub-gear case head l5 mounts the vertical drive shaft l5 which has aconventional reversible drive mechanism including the clutch pinions I!and is rotatably mounted on the drive shaft and a clutch member l6slidably keyed to the shaft. r

The handle 49 through conventional mechanism controls the forward,reverse and neutral positions of the clutch I6.

The driven gear [9 departs from conventional r the sleeve drives theroll l2 through the pin l2 as shown.

A spring 39 is tensioned between the pin 38 and a button 4|) to urge thegear I9 out of mesh with the gears and I8.

Interposed between the gear I9 and the cam 4| is a mating cam 42slidably keyed to the cap 36 by dual key bosses 42' in the slots 36'.When the cam 4| is rotated the cams ride up on their incline faces andabut each other on the flat points of the cam faces forcing the gear l9into driving relation with the gears l! and I8 as shown in Fig. 1.Reverse rotation of the cam 4| allows them to mesh with each other andpermits the gear l9 to be drawn out of mesh as shown in Fig. 9.

Now referring to Figs. 2, 3, 4 and 5, a handle 26 is pinned to ahorizontal crank shaft 21 extending longitudinally and pivotally mountedin the wringer frame Ill. The handle 26 has a lever lip 26 on its innerend adapted to contact the cam arm 4| of the cam 4| and rotate it toengaged position as shown in Figs. 2 and 3. It will also be noted thatthe dog 23 is actuated behind the vertical face of the cam wing 4| tolock cam 4| in operating position as shown in Fig. 3.

The action of spring 25 to rotate cam 4| into stopped position is wellillustrated in Figs. Band Now referring to Figs. l, 5 and 6, the crankportions 21' of the shaft 2'! are shown as they engage in slots 28 of,dual lever member 28 pivoted on pins 29 in the end plates 2|. Theopposite ends of the levers 28 bearagainst spring plugs 30 by theadjustable set screws 29 and are urged downward by compression springs3| mounted in each end of the wringer.

Referring to Figs. 3 and 5, the handle 26 has been pulled down, the cam4| rotated into locked operating position, the end plates 2| have beenlifted up until the latch bars 20 have engaged their tapered ends 20into contact with the taper faces 33 of the slots 33 by means ofmovement of the levers 28 by the cranks 27 in the slots 28. Now, bypulling the handle 26 upward, the crank 21' pulls down the 'top frame Hand the roll l3 against the roll |2 by reaction of the set screw 29against the plug 3|) and the spring 3| and we have the rolls in pressurerelation as shown in Fig. 4. 1

It will readily be understood that when the pressure release mechanismis actuated, the lock bars 20 will be readily retractable because of thetapercontacts to release the end plates 2| allowing the upper frame androll to move upward into releasedposition.

Now referring to Figs. '7 and 8, it will be noted that the roll I2 isrestricted to a low position and from shifting sidewise by the rivet 2|as shown in Fig. '7. In this position the slot 22' 'in the bearing block22 has forced the tail of the 4 dog 23 behind the fan arm of the cam 4|lwhich retains the driving gears in mesh. However;

when the roll pressure is released and the roll I2 moves upward as shownin Fig. 8, the upward movement of the slot 22' with the spring 24,

pivots the dog 23 in its mounting 23' which releases the tail frombehind the fan arm 4| which permits the spring 25, as shown in Figs. 2and 3, to rotate the cam 4| permitting the spring 39 as shown in Figs.11 and 12 to pull the gear l9 out of mesh with the gears I1 and I8, thusstopping the rolls.

Operation Having thus described the parts and their relation' to eachother, I will now describe'the operation of my .roll stop mechanism.

Assuming the wringer in operation, as-shown in Fig. l, the roll pressureis instantly released by the operators touching the release target l4which retracts the lock bars 20 permitting the top frame and roll tomove upward to release position.

The upward movement of the roll bearing bracket 22 actuates the dog 23into release position permitting the cam 4| to be rotated into positionto mesh with cam 42 and allowing the driven gear l9 to be withdrawn fromdriven relationship with the horizontal wringer head gears. Thus therotation of the rolls is stopped with release of pressure.

The wringer is again put in operating condition byholding the top framedown while the hand lever 26 is depressed. This raises the end plates 2|which re-engages the lock bars 20 into locked relation with the endplates. The hand lever 26 is now raised and this pulls down the topframe and top roll into locked pressure contact with the lower rollthrough rotation of the cranks 21' which pivots the levers 28 againstthe springs 3|.

Simultaneously with the above operation the pressure lever 26 by contactof the lever arm 26' with cam'arm 4| has rotated the cam 4| to cause thedrivegears to be meshed in driving relation and the downward movement ofthe bearing block. 22 has forced the 'dog 23 into holding positionbehind the fan arm of 4|. Thus the rolls are in pressure relation andthe wringer is in operating position.

The foregoing will, I believe, completely disclose my roll stopmechanism. I have shown and described a preferred embodiment of myinvention. HoweverI do not desire to belimited to the structureshownexcept by the claim thereon.

I new claim as new:

In a power driven clothes wringer, a manually reversible gear head,lower and upper frames, a pair of cooperative pressure rolls in thelower frame, pressure springs in the lower frame, bail means for joiningthe frames together in pressure sustaining relationship, lever means inthe lower frame coacting with said springs and bail to create rollpressure, safety release mechanism in the upper frame to unhook bail andrelease roll pressure, cam means co-axial with the driven gear to slidesaid gear into or out of engagement with the reversing gears in the headand cam latch means on the bail operable by upward release movement ofthe upper roll to permit reverse movement of the cam and disengagementof the gear to stop rotation of the rolls.

I VERNON E. DUNN.

